The latest Prairie wind trajectory cereal rust risk report is available for download now at the following link: June 7-13, 2023 report.
As of the period of June 7-13, 2023 the overall Prairie cereal rust risk assessment and need for in-crop scouting is as follows:
Pacific Northwest – There was a lower number of reverse wind trajectories that passed over the PNW region and into the Prairies versus May 31-June 6. Given this, and limited stripe rust development in the PNW and generally dry western Prairie conditions especially in western regions, as of June 13, 2023 the risk of stripe rust appearance from the PNW is low and scouting for this disease in the Prairie region is generally not urgent.
Texas-Oklahoma corridor – Given
limited leaf, stem, stripe and crown rust development in this corridor, and
that most crops are approaching maturity or are being harvested, as of June
13, 2023 the risk of stem, leaf, stripe, and crown rust appearance from the
Texas-Oklahoma corridor is generally limited and scouting for these diseases in
the Prairie region is not urgent.
Kansas-Nebraska corridor – Given
a lower number of wind trajectories from this region, and generally limited
leaf, stem, stripe and crown rust development in this corridor, as of June
13, 2023 the risk of stem, leaf, stripe, and crown rust appearance from the
Kansas-Nebraska corridor is generally low and scouting for these diseases in the
Prairies is not urgent.
However, recent reports of increasing levels of stripe rust in NW and
west central Kansas, and the continued observation of stem rust in Kansas
commercial fields may represent an emerging concern. These observations are a
concern, especially for the central to eastern Prairie regions with rainfall
over the last 2-4 days. Farmers and consultants in the central-eastern Prairies
should consider keeping an eye out for stripe and stem rust development,
especially in fields planted to susceptible varieties.
